Home / 285,974.02-428,950.22-86,289.08

Finding the Fourth Proportional to 285,974.02, 428,950.22 and 86,289.08

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Solution

The fourth proportional to 285,974.02, 428,950.22 and 86,289.08 is: 129,430.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,974.02 : 428,950.22 = 86,289.08 : x
  2. Step 2: Convert to fraction form
    285,974.02/428,950.22 = 86,289.08/x
  3. Step 3: Cross multiply
    285,974.02x = 428,950.22 × 86,289.08
  4. Step 4: Simplify right side
    285,974.02x = 37,013,719,849.60
  5. Step 5: Solve for x
    x = 37,013,719,849.60/285,974.02
  6. Step 6: Final answer
    x = 129,430.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.